must attempt
Verbo regular: attempt - attempted- attempted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must attempt
you must attempt
she must attempt
we must attempt
you must attempt
they must attempt 	I must be attempting
you must be attempting
she must be attempting
we must be attempting
you must be attempting
they must be attempting	I must have attempted
you must have attempted
she must have attempted
we must have attempted
you must have attempted
they must have attempted	I must have been attempting
you must have been attempting
she must have been attempting
we must have been attempting
you must have been attempting
they must have been attempting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't attempt
you mustn't attempt
she mustn't attempt
we mustn't attempt
you mustn't attempt
they mustn't attempt 	I mustn't be attempting
you mustn't be attempting
she mustn't be attempting
we mustn't be attempting
you mustn't be attempting
they mustn't be attempting	I mustn't have attempted
you mustn't have attempted
she mustn't have attempted
we mustn't have attempted
you mustn't have attempted
they mustn't have attempted	I mustn't have been attempting
you mustn't have been attempting
she mustn't have been attempting
we mustn't have been attempting
you mustn't have been attempting
they mustn't have been attempting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I attempt?
must you attempt?
must she attempt?
must we attempt?
must you attempt?
must they attempt? 	must I be attempting?
must you be attempting?
must she be attempting?
must we be attempting?
must you be attempting?
must they be attempting? 	must I have attempted?
must you have attempted?
must she have attempted?
must we have attempted?
must you have attempted?
must they have attempted? 	must I have been attempting?
must you have been attempting?
must she have been attempting?
must we have been attempting?
must you have been attempting?
must they have been attempting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I attempt?
mustn't you attempt?
mustn't she attempt?
mustn't we attempt?
mustn't you attempt?
mustn't they attempt? 	mustn't I be attempting?
mustn't you be attempting?
mustn't she be attempting?
mustn't we be attempting?
mustn't you be attempting?
mustn't they be attempting? 	mustn't I have attempted?
mustn't you have attempted?
mustn't she have attempted?
mustn't we have attempted?
mustn't you have attempted?
mustn't they have attempted? 	mustn't I have been attempting?
mustn't you have been attempting?
mustn't she have been attempting?
mustn't we have been attempting?
mustn't you have been attempting?
mustn't they have been attempting?